Roseola

Definition

Roseola is a common viral infection in young children characterized by a sudden high fever followed by a distinctive rash. It is mainly caused by human herpesvirus 6 (HHV-6) and sometimes human herpesvirus 7 (HHV-7).

5 Must Know Facts For Your Next Test

1. Roseola primarily affects children between 6 months and 2 years old.
2. The initial symptom is a sudden high fever lasting for three to five days, often exceeding 103°F (39.4°C).
3. After the fever subsides, a pinkish-red rash typically appears on the torso and spreads to the limbs and neck.
4. Human herpesvirus 6 (HHV-6) is the most common cause of roseola, though HHV-7 can also be responsible.
5. Complications are rare but can include febrile seizures due to the rapid onset of high fever.

Review Questions

• What age group is most commonly affected by roseola?
• Which virus is primarily responsible for causing roseola?
• What sequence of symptoms typically characterizes roseola?

Related terms

Human Herpesvirus 6 (HHV-6): A virus that commonly causes roseola in infants and young children.

Febrile Seizure: Seizures that occur in young children with rapid onset of high fever, often associated with illnesses like roseola.

Exanthem Subitum: Another term for roseola, highlighting its sudden rash appearance following a high fever.